Kippenhahn curves of some tridiagonal matrices
Functional Analysis
2020-11-03 v1
Abstract
Tridiagonal matrices with constant main diagonal and reciprocal pairs of off-diagonal entries are considered. Conditions for such matrices with sizes up to 6-by-6 to have elliptical numerical ranges are obtained.
Keywords
Cite
@article{arxiv.2011.00849,
title = {Kippenhahn curves of some tridiagonal matrices},
author = {Natália Bebiano and Joáo da Providéncia and Ilya M. Spitkovsky and Kenya Vazquez},
journal= {arXiv preprint arXiv:2011.00849},
year = {2020}
}
Comments
20 pages, 4 figures